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Agilent intros new digital communications analysis tools

Posted: 30 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:jitter analysis? signal analysis? EMI management? Agilent? digital communications analyzer?

Agilent's 83496B <a href=clock recovery module" ALIGN="RIGHT">

Agilent Technologies Inc. has introduced a phase noise application software and new options for the digital communications analyzer (DCA-J). The software, said to be an industry first, allows phase noise/spectral jitter analysis of clock and data signals over a wide dynamic range of 50Mbps to 13.5Gbps. A new optical/electrical module provides optical transmitter test and 40Gbps optical compliance test. An advanced amplitude analysis option offers new methods for optical modulation amplitude and relative intensity noise.

Precise waveform measurement
The Agilent 83496B, a multirate wide loop bandwidth clock recovery module, allows precision waveform measurements with a variety of signals, including spread spectrum clocked.

Many serial bus architectures employ spread spectrum clocking for better signal integrity, known as EMI management. Hardware clock recovery elements of sampling oscilloscopes have not been able to follow the large amounts of jitter produced with spread spectrum clocks, making meaningful measurements virtually impossible. This has been overcome with the Agilent 83496B.

The 83496B and phase noise application software reveal root causes of jitter through frequency domain analysis, an effective and easy method for detecting jitter sources. Also, this solution can perform the analysis on both clock and data signals, so the root causes of data jitter can be related to system clocks.

Jitter root causes revealed
"This tool allows our customers to see the root causes of jitter, whereas other measurement tools are limited in dynamic range or in the types of signals they can observe," said Sigi Gross, VP and general manager of Agilent's digital verifications solutions division.

In addition, the DCA-J offers three new functionalities for optical applications:

  • 40Gbps compliance with Agilent 86116C optical/electrical module: The 86116C can be used as a 65GHz oscilloscope channel or switched to a reference receiver for 40Gbps optical transmitter eye-mask test. Carefully controlled frequency response allows operation as a reference receiver and provides consistent and accurate eye mask tests. It can be configured at standard or FEC rates for OC-768, STM-256 and related specifications.

  • Just as the DCA-J revolutionized jitter analysis, DCA-J option 300 provides the same industry-accepted analysis now translated into the amplitude domain. This enables capabilities such as Relative Intensity Noise (RIN) measurement, a common specification for optical transmitters. Historically, RIN measurements have required expensive or complicated test equipment. Now, with this software, eye-mask tests and RIN measurements can be performed quickly and accurately using the same equipment and at the same time. Option 300 also allows separation of interference parameters to extremely low probabilities, providing an accurate measurement of Q-factor, commonly used to estimate bit error ratio.

  • Easy OMA measurements for the 86100C DCA-J: Agilent's new Rev 7.0 firmware for the 86100C DCA-J enhances the system through a novel approach to the measurement of optical modulation amplitude (OMA), a common specification for optical transmitters. The general OMA test requires special data patterns. Agilent's 86100C provides the correct OMA result for these patterns, and has the added flexibility to provide an accurate OMA result for virtually any data pattern. This flexibility eliminates the need to reconfigure the stimulus, saving measurement time for a complete characterization of the transceiver.

Availability and pricing
All products will be available Feb. 1. Pricing is as follows: the Agilent 83496B multirate wide bandwidth clock recovery module will start at $18,500.

The Agilent 86116C optical/electrical module will start at $64,089.

The Agilent 86100C Option 300 amplitude interference/RIN/Q-factor software will cost $2,800. (Note: Requires option 200.)

The Agilent 86100C Infiniium DCA-J firmware revision 7.0 will be available for free at Agilent's Website. Note that Firmware revision 7.0 is not compatible with the 86100A or 86100B. Contact the company to upgrade these mainframes to an 86100C.

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